The rubber flap check valve is made of ductile iron casting and coated with epoxy resin to effectively prevent rusting. The valve flap is made of Q235 steel and vulcanized with EPDM rubber to prevent problems such as detachment and poor sealing. It uses the flow force of water to open or close the freely falling valve flap.

Rubber flap check valves can be installed horizontally or vertically, and are widely used as a substitute for bottom valves by many users.
The rubber disc in the valve is made of steel plate, steel rod, and reinforced nylon cloth as the substrate, and the outer layer is covered with rubber. The valve disc can be opened and closed up to 1 million times. The H44X (SFCV) series rubber flap check valve adopts a full flow area design, which has the characteristics of low head loss, less accumulation of debris, and easy maintenance. The H44X (SFCV) series rubber flap check valve is mainly suitable for horizontally installed water supply and drainage systems. It can be installed at the outlet of the water pump to prevent backflow and water hammer damage to the pump. The H44X (SFCV) series rubber flap check valve can also be installed on the bypass pipe of the inlet and outlet pipes of the reservoir to prevent water from flowing back into the water supply system